gmail_remove_label · Mariana Google MCP: Risk & Policy

WHAT IT DOES

What gmail_remove_label does on Mariana Google MCP

AI agents use gmail_remove_label to create or update resources in Mariana Google MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mariana Google MCP environment.

WHY IT NEEDS A POLICY

Why gmail_remove_label needs a policy

Removing a label from Gmail messages modifies metadata on those messages but does not delete the messages themselves. This is a reversible modification (labels can be re-applied), making it a Write operation. The blast radius is medium since it could affect organization/filtering of multiple messages at once, but the messages themselves remain intact.

From the tool's definition Remove a label from one or more Gmail messages

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

gmail_remove_label Rate-limited

gmail_remove_label stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "gmail_remove_label": {
      "limits": [
        {
          "counter": "gmail_remove_label_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mariana Google MCP, so you can run agents against it safely.

FAQ

Questions about gmail_remove_label

What does the gmail_remove_label tool do? +

Remove a label from one or more Gmail messages. Use gmail_list_labels to find label IDs. It is categorised as a Write tool in the Mariana Google MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on gmail_remove_label? +

Register the Mariana Google MCP server in PolicyLayer and add a rule for gmail_remove_label: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mariana Google MCP. Nothing to install.

What risk level is gmail_remove_label? +

gmail_remove_label is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit gmail_remove_label? +

Yes. Add a rate_limit block to the gmail_remove_label rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block gmail_remove_label completely? +

Set action: deny in the PolicyLayer policy for gmail_remove_label. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides gmail_remove_label? +

gmail_remove_label is provided by the Mariana Google MCP server (marianasmall/mariana-google-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.